<template>
  <div id="hmMain">
    我是中间
    <HmButton />
  </div>
</template>

<script>
export default {
    name: 'HmMain'
}
</script>

<style>
#hmMain {
    height: 400px;
    margin: 20px;
    border: 2px solid #000;
}
</style>